However, IVF in these rhinoceroses comes with its own set of challenges, including figuring out how to get immature eggs to develop outside of the female's body and also how to inject sperm into these eggs.Īs for the Sumatran rhinos, they are hanging on by a thread as well. With natural breeding attempts nixed for the northern white rhinos, conservationists have turned to in vitro fertilization. The two females are incapable of a successful pregnancy: Najin is too old and issues with her legs make it impossible for her to support the weight of a mounting male Fatu has a uterine condition that will likely keep her from breeding, according to experts. The captive northern white rhinos are two females - Najin, Sudan's daughter, and Fatu, Najin's daughter - which live in the Ol Pejeta Conservancy in Kenya. There are now only two northern white rhinos left in the world, both living in captivity, according to the World Wildlife Fund. On March 20, 2018, the conservancy announced the death of the last male northern white rhino, Sudan. He was not a victim of poaching, however, and the conservancy was investigating the cause of death. 18, 2014, Ol Pejeta Conservancy announced that one of them, one of the last two breeding males, had died. In 2009, four northern white rhinos were moved from a zoo in the Czech Republic to a private conservancy in Kenya in the hope that they would breed, according to the IUCN. However, the northern white rhino is considered 'extinct' in the wild. Southern white rhinos have an increasing population there are 20,405 southern white rhinos. White rhinos are 'near threatened,' which means they may be considered threatened by extinction in the near future.The total population estimate in 2007 was 2,575 individuals, according to the IUCN. Fortunately, their population is increasing there are 3,333 greater one-horned rhinos in the world. Greater one-horned rhinos are 'vulnerable,' which means they may become endangered unless circumstances improve.

There are 5,055 black rhinos, fewer than 100 Sumatran rhinos and only 35 to 44 Javan rhinos.

Black rhinos, Sumatran rhinos and Javan rhinos are 'critically endangered,' which is the list's highest risk category.A black rhino carcass with the horn hacked off.

Rhinoceros 6 for private user